Robo-Tank DIY ATO System
User Manual – Page 9
4. Managing Alarms
The ATO system has a loud buzzer which is used to relay feedback while navigating the setup menu and to alert you of
any malfunctions. You can adjust the volume of the buzzer for the alarms in the setup menu, default is full volume (see
page 12).
These are the scenarios that can set off the alarm and the beep pattern that is emitted.
Scenario
Beep Pattern
Water reaches Sensor 2 and there is no Sensor 3 on ATO
2 beeps per second
Water reaches Sensor 2 and Sensor 3 is used for ATO
1 beep per second
If water reaches Sensor 3 on ATO
2 beeps per second
Emergency timeout shuts off pump
Rapid beeping
If system detects issue with DC pump
1 beep every 2 seconds
If Sensor 3 detects low level in reservoir
1 beep every 5 seconds
The ATO has an adjustable timer that will suppress alarms (except issues with DC pump) so it only sounds if necessary,
the default delay is 10 minutes, check page 12 for details to adjust it.
If an alarm event occurs the pump will still be turned off immediately but the alarm won’t sound until the timer expires.
If all the ATO sensors report good conditions before the timer expires the alarm will be cleared however if the timer
expires and a sensor still reports an error the alarm will sound and continue until it’s been reset.
To reset the alarm push the button on the side of the case momentarily and remember to replace the failed sensor.
5. ATO Maintenance Mode
The ATO has what’s called a maintenance mode, this will simply put the ATO in lockdown mode while you do
maintenance on your aquarium. If water drops below Sensor 1 the ATO will remain off.
You can switch maintenance mode on/off by pressing and holding the side push button on the case for 1.5 Seconds or
after 1 beep is heard. The front side LED will start flashing rapidly indicating maintenance mode is active. To restore the
ATO simply press and hold the side push button again for 1.5 seconds or after 1 beep and the front side LED will turn off.
Note: The system will automatically revert back to working mode after 6 hours
6. ATO Test Mode
While installing the ATO or if testing the sensors it’s useful to have real time feedback, if you enable the test mode all
the delays are removed and alarms are instant.
To enable the test mode, press and hold the push button on the side of the case for 3 seconds or after beep 2 beeps are
heard. The LED on the side front will light up and stay lite indicating that test mode is active. To revert back to working
mode press and hold the side button for another 3 seconds, the ATO will send out a single long beep and the side front
LED will turn off.
Note: The system will automatically revert back to working mode after 60 minutes
